Mariah Yeater, 20, is demanding that pop star Justin Beiber, 17, take a paternity test to determine that he is the father of her 4-month-old son after a tryst last year.

Bieber's camp says he has scheduled a paternity test for two weeks from now, when he returns from Europe, where he has been performing and spending time with girlfriend Selena Gomez (see photos of the two in Paris below!)

On Wednesday, Yeater's lawyers said they had first tried to settle with the pop star out of court. Chicago lawyer Jeffrey Leving said he sent e-mails to Bieber's camp in September and October asking for a private paternity test and negotiations for child support; he said that, at the time, he and Yeater saw no need for a public court filing.

“It could have been done painlessly, with the media never knowing about it,”
he said.

Leving says he trusts Yeater's story, and wants to make sure that Bieber's DNA test is done properly. “People are so enamored with Justin Bieber, you could have someone change samples in a lab because of love for this guy," he said.

A court hearing is scheduled for Dec. 15. Read about Yeater's criminal past after the jump.